Amber Alert: Search for missing boys expands to Tenn.

Update: An Amber Alert for two boys kidnapped out of Hillsborough County has been expanded to Tennessee, our sister station WBIR reports.

The Tennessee Bureau of Investigation says Joshua and Sharyn Hakken may be in East Tennessee with their two boys, Cole and Chase. Neither Joshua nor Sharyn have legal custody of their children.

There was an unconfirmed sighting of Joshua Hakken's 2006 black GMC Sierra in the area of Highway 30 and Highway 411 in Etowah, Tenn. on Wednesday around 8 p.m. The truck has Florida license plate U95KT (USF tag).

Tennessee authorities ask if you have seen this vehicle or the children, you are urged to call the TBI at 1-800-TBI-FIND or the Hillsborough County Sheriff's Office at 813-247-8200.

Earlier Report:

TAMPA, Florida -- The Hillsborough County Sheriff's Office says a father who allegedly kidnapped his boys could be anywhere in the southeast part of the country.

"He entered the residence, where he tied up the grandmother and then removed the children," said Corporal Kevin Bodie, a case detective with the Hillsborough County Sheriff's Office.

It happened in what neighbors describe as a quiet neighborhood just as parents were taking their children to school.

"My heart breaks, my heart beaks for everybody in the family, but particularly for those two little boys," said Carla Bolling, who saw all the activity around the grandmother's home on Shady Shores Drive in Tampa.

Hakken was last seen with the children and his wife, Sharyn, in a Black 2006 GMC pickup truck with Florida license plate number U95-KT (USF tag). Investigators are not sure if she was part of the kidnapping plot or a victim.

"We do feel that they are in danger due to the nature, the means where they were taken," said Corporal Bodie.

Throughout the evening, deputies searched Hakken's home on South Sterling Avenue in South Tampa first with a K-9. Detectives were seen removing several computers to pinpoint his whereabouts.

Late Wednesday afternoon, a warrant was issued for Joshua Hakken's arrest on two counts of kidnapping, two counts of child neglect, two counts of false imprisonment, one count of burglary with batter, and one count of grand theft auto.

The children were originally removed from Hakken's custody last year in Louisiana following multiple drug charges. While in foster care, Joshua Hakken allegedly showed up at the foster care facility waving a gun and began beating on the front door. He fled the scene without his children after he was unable to enter the secured facility.

Louisiana State Police have also issued a level II - Endangered/Missing Advisory as the parents and children may be traveling to or through Louisiana.